at this hour, the u.s. embass neislamabad, pakistan, warning americans to stay away from government buildings and several major hotels, citing a general threat, an alert issued by the pakistani security officials n. venezuela, voters are going to the polls right now. at stake, social president's hugo chavez' 14-year control of power in that country. later on today in cape canaveral, 34 da, the first privately contracted supply mission to the international space station is scheduled to left off later on tonight. >> background, we found it on principle that all men are created equal. and that the rights of every man are diminished when the rights of one man are threatened. >> jamie: well, that was president john f. kennedy, delivering his historic address in 1964. it was a speech that changed the national debate on civil rights. well, here we are with an election 30 days away. and the debates are in spule swing. a new book, presidential courage, three speeches that changed america, takes a look at the moments that have truly inspire period our nation. warren kozak is the author and he is here l